Use a Flux Definition node () to define the flux for a dependent variable anywhere it is defined.

To add a Flux Definition, right-click a Component, Feature, or Property node and select it from the Variables submenu.

The Settings window has the following sections:

In the Dependent variable reference and Physical quantity lists, you specify what dependent variable to change the scaling for. See Dependent Variable Declaration for the settings information. Also, enter an expression for the flux in the Expression field.

The options in the Selection list and Output entities list define the selection where this variable definition is valid.

Select the Zero out components check box to enforce a symmetry to spatial vectors and matrices using an option from the Zero out components list.

If you choose Zero out-of-plane, the out-of-plane component is set to zero in the space dimensions 1D, 2D, 1D axial symmetry, and 2D axial symmetry. The out-of-plane component in 2D axial symmetry is the second component (the φ-component).

The Zero in-plane setting does the opposite and has no effect in 3D, for scalars, or non-spatial tensors (length other than 3).

If you choose Property dependent, you can choose to zero out some components for specific values of some property values. For each row in the table of property values, choose Zero out-of-plane, Zero in-plane, or Keep all components from the list under Components to zero out for the corresponding property value under Property value. From the Setting for other property values list, choose Zero out-of-plane, Zero in-plane, or Keep all components to control how other property values are zeroed out. Select the Use the setting above for undefined references check box to use the default value even when the property does not exist.

If you choose Explicit, the enter the components to zero out in the Components to zero out field (default: 0, 1, 2).